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virtio-gpu: Add helpers to create and destroy dmabuf objects 

These helpers can be useful for creating dmabuf objects from blobs
and submitting them to the UI.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Message-Id: <20210526231429.1045476-12-vivek.kasireddy@intel.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Vivek Kasireddy 2021-05-26 16:14:26 -07:00 committed by Gerd Hoffmann
parent 8069b73bee
commit 5752519e93
3 changed files with 89 additions and 0 deletions
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65
hw/display/virtio-gpu-udmabuf.c
View File

@ -156,3 +156,68 @@ void virtio_gpu_fini_udmabuf(struct virtio_gpu_simple_resource *res)
virtio_gpu_destroy_udmabuf(res);
}
}
static void virtio_gpu_free_dmabuf(VirtIOGPU *g, VGPUDMABuf *dmabuf)
{
struct virtio_gpu_scanout *scanout;
scanout = &g->parent_obj.scanout[dmabuf->scanout_id];
dpy_gl_release_dmabuf(scanout->con, &dmabuf->buf);
QTAILQ_REMOVE(&g->dmabuf.bufs, dmabuf, next);
g_free(dmabuf);
}
static VGPUDMABuf
*virtio_gpu_create_dmabuf(VirtIOGPU *g,
uint32_t scanout_id,
struct virtio_gpu_simple_resource *res,
struct virtio_gpu_framebuffer *fb)
{
VGPUDMABuf *dmabuf;
if (res->dmabuf_fd < 0) {
return NULL;
}
dmabuf = g_new0(VGPUDMABuf, 1);
dmabuf->buf.width = fb->width;
dmabuf->buf.height = fb->height;
dmabuf->buf.stride = fb->stride;
dmabuf->buf.fourcc = qemu_pixman_to_drm_format(fb->format);
dmabuf->buf.fd = res->dmabuf_fd;
dmabuf->scanout_id = scanout_id;
QTAILQ_INSERT_HEAD(&g->dmabuf.bufs, dmabuf, next);
return dmabuf;
}
int virtio_gpu_update_dmabuf(VirtIOGPU *g,
uint32_t scanout_id,
struct virtio_gpu_simple_resource *res,
struct virtio_gpu_framebuffer *fb)
{
struct virtio_gpu_scanout *scanout = &g->parent_obj.scanout[scanout_id];
VGPUDMABuf *new_primary, *old_primary = NULL;
new_primary = virtio_gpu_create_dmabuf(g, scanout_id, res, fb);
if (!new_primary) {
return -EINVAL;
}
if (g->dmabuf.primary) {
old_primary = g->dmabuf.primary;
}
g->dmabuf.primary = new_primary;
qemu_console_resize(scanout->con,
new_primary->buf.width,
new_primary->buf.height);
dpy_gl_scanout_dmabuf(scanout->con, &new_primary->buf);
if (old_primary) {
virtio_gpu_free_dmabuf(g, old_primary);
}
return 0;
}

15
include/hw/virtio/virtio-gpu.h
View File

@ -150,6 +150,12 @@ struct VirtIOGPUBaseClass {
DEFINE_PROP_UINT32("xres", _state, _conf.xres, 1024), \
DEFINE_PROP_UINT32("yres", _state, _conf.yres, 768)
typedef struct VGPUDMABuf {
QemuDmaBuf buf;
uint32_t scanout_id;
QTAILQ_ENTRY(VGPUDMABuf) next;
} VGPUDMABuf;
struct VirtIOGPU {
VirtIOGPUBase parent_obj;
@ -178,6 +184,11 @@ struct VirtIOGPU {
uint32_t req_3d;
uint32_t bytes_3d;
} stats;
struct {
QTAILQ_HEAD(, VGPUDMABuf) bufs;
VGPUDMABuf *primary;
} dmabuf;
};
struct VirtIOGPUClass {
@ -259,6 +270,10 @@ void virtio_gpu_update_cursor_data(VirtIOGPU *g,
bool virtio_gpu_have_udmabuf(void);
void virtio_gpu_init_udmabuf(struct virtio_gpu_simple_resource *res);
void virtio_gpu_fini_udmabuf(struct virtio_gpu_simple_resource *res);
int virtio_gpu_update_dmabuf(VirtIOGPU *g,
uint32_t scanout_id,
struct virtio_gpu_simple_resource *res,
struct virtio_gpu_framebuffer *fb);
/* virtio-gpu-3d.c */
void virtio_gpu_virgl_process_cmd(VirtIOGPU *g,

9
stubs/virtio-gpu-udmabuf.c
View File

@ -16,3 +16,12 @@ void virtio_gpu_fini_udmabuf(struct virtio_gpu_simple_resource *res)
{
/* nothing (stub) */
}
int virtio_gpu_update_dmabuf(VirtIOGPU *g,
uint32_t scanout_id,
struct virtio_gpu_simple_resource *res,
struct virtio_gpu_framebuffer *fb)
{
/* nothing (stub) */
return 0;
}